usr.bin/soelim/soelim.c

   1 /*-
   2  * Copyright (c) 2014 Baptiste Daroussin <bapt@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer
  10  *    in this position and unchanged.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  * $FreeBSD: head/usr.bin/soelim/soelim.c 303526 2016-07-30 01:07:47Z bapt $
  27  */
  28
  29 #include <sys/types.h>
  30
  31 #include <ctype.h>
  32 #include <err.h>
  33 #include <limits.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include <stringlist.h>
  38 #include <unistd.h>
  39
  40 #define C_OPTION 0x1
  41
  42 static StringList *includes;
  43
  44 static void
  45 usage(void)
  46 {
  47
  48         fprintf(stderr, "usage: soelim [-Crtv] [-I dir] [files]\n");
  49
  50         exit(EXIT_FAILURE);
  51 }
  52
  53 static FILE *
  54 soelim_fopen(const char *name)
  55 {
  56         FILE *f;
  57         char path[PATH_MAX];
  58         size_t i;
  59
  60         if (strcmp(name, "-") == 0)
  61                 return (stdin);
  62
  63         if ((f = fopen(name, "r")) != NULL)
  64                 return (f);
  65
  66         if (*name == '/') {
  67                 warn("can't open '%s'", name);
  68                 return (NULL);
  69         }
  70
  71         for (i = 0; i < includes->sl_cur; i++) {
  72                 snprintf(path, sizeof(path), "%s/%s", includes->sl_str[i],
  73                     name);
  74                 if ((f = fopen(path, "r")) != NULL)
  75                         return (f);
  76         }
  77
  78         warn("can't open '%s'", name);
  79
  80         return (f);
  81 }
  82
  83 static int
  84 soelim_file(FILE *f, int flag)
  85 {
  86         char *line = NULL;
  87         char *walk, *cp;
  88         size_t linecap = 0;
  89         ssize_t linelen;
  90
  91         if (f == NULL)
  92                 return (1);
  93
  94         while ((linelen = getline(&line, &linecap, f)) > 0) {
  95                 if (strncmp(line, ".so", 3) != 0) {
  96                         printf("%s", line);
  97                         continue;
  98                 }
  99
 100                 walk = line + 3;
 101                 if (!isspace(*walk) && ((flag & C_OPTION) == 0)) {
 102                         printf("%s", line);
 103                         continue;
 104                 }
 105
 106                 while (isspace(*walk))
 107                         walk++;
 108
 109                 cp = walk;
 110                 while (*cp != '\0' && !isspace(*cp))
 111                         cp++;
 112                 *cp = 0;
 113                 if (cp < line + linelen)
 114                         cp++;
 115
 116                 if (*walk == '\0') {
 117                         printf("%s", line);
 118                         continue;
 119                 }
 120                 if (soelim_file(soelim_fopen(walk), flag) == 1) {
 121                         free(line);
 122                         return (1);
 123                 }
 124                 if (*cp != '\0')
 125                         printf("%s", cp);
 126         }
 127
 128         free(line);
 129         fclose(f);
 130
 131         return (0);
 132 }
 133
 134 int
 135 main(int argc, char **argv)
 136 {
 137         int ch, i;
 138         int ret = 0;
 139         int flags = 0;
 140
 141         includes = sl_init();
 142         if (includes == NULL)
 143                 err(EXIT_FAILURE, "sl_init()");
 144
 145         while ((ch = getopt(argc, argv, "CrtvI:")) != -1) {
 146                 switch (ch) {
 147                 case 'C':
 148                         flags |= C_OPTION;
 149                         break;
 150                 case 'r':
 151                 case 'v':
 152                 case 't':
 153                         /* stub compatibility with groff's soelim */
 154                         break;
 155                 case 'I':
 156                         sl_add(includes, optarg);
 157                         break;
 158                 default:
 159                         sl_free(includes, 0);
 160                         usage();
 161                 }
 162         }
 163
 164         argc -= optind;
 165         argv += optind;
 166
 167         if (argc == 0)
 168                 ret = soelim_file(stdin, flags);
 169
 170         for (i = 0; i < argc; i++)
 171                 ret = soelim_file(soelim_fopen(argv[i]), flags);
 172
 173         sl_free(includes, 0);
 174
 175         return (ret);
 176 }